shell exec

Refer to: Linux commands, editors, and shell programming, and advanced programming in UNIX environment   Both exec and source are Bash Internal commands (builtins commands). Enter man exec or man source in Bash to view all internal command

Both exec and source belong to the Bash Internal command (builtins commands), which is entered under bash for man exec or Man source can view all the internal command information. The bash shell commands fall into two categories: external commands

Both exec and source belong to the Bash Internal command (builtins commands), where you can view all the internal command information by entering man exec or man source under bash. The bash shell commands are divided into two categories: external

Fork (/directory/script.sh): If the shell contains execution commands, then the subcommand does not affect the parent's commands, and then executes the parent command after the subcommands have finished executing. The children's environment

Reference: Linux commands, editor and Shell programming, advanced Programming for UNIX environmentsReferenceThe bash shell commands are divided into two categories: external commands and internal commands.

Reference: Linux commands, editor and Shell programming, advanced Programming for UNIX environmentsBoth exec and source belong to the Bash internal command (builtins commands), where you can view all the internal command information by entering man

Three different methods (fork, exec, source) fork (/directory/script. sh) fork is the most common, that is, directly using/directory/script in the script. sh to call the script. sh script. run a sub-sh... three different methods (fork, exec, source)

Summary: three methods of executing shell scripts, fork, source and exec, are summarized.  Prerequisites 1. any program we run is a child process generated by the parent process. After the child process is completed, it is returned to the parent

Three different methods (fork, exec, source) fork (/directory/script. sh) fork is the most common, that is, directly using/directory/script in the script. sh to call the script. sh script. run a sub-shell script to execute the call. When sub-shell

From: http://mindream.wang.blog.163.com/blog/static/2325122220084624318692/Fork (/directory/script. Sh)Fork is the most common. It uses/directory/script. Sh directly in the script to call the script. Sh script.Run a sub-shell script to execute the